Tank-dome closure



April 6 31926.

V. WILLOUGHBY TANK DOME CLOSURE Filed April 27, 1925 2 Sheets-Sheet lTANK DOME 'CLOSURE File@ April 27, 1925 2 sneetsQ-sheet 2 Patented Apr,6, 1926.

savana ortica.

'VICTOR WZLLOUG-HBY, OF RDGEWOOD, NEW JERSEY, ASSIGNOR T0 .MERICN CABvANI) FGUNDRY COMFANY, OF NE1L YORK, N. Y., .A CORPORATION 0F NEW JERSEY.

TANK-@OME CLSUBE.

tppllcaton filed April' 2?, 1925. Serial No. 26,121.

T all 'whom it mag/concern.

Be it known that l, VICTOR WILLOUGHBY, residin at Ridgewood, BergenCounty, New ersey, and being a citizen of the United States, haveinvented certain new and useful Improvements in Tank-Dome Closures, ofwhich the lfollowing is a full, clear, and exact description, suchaswill en able others skilledV in the art to which it appertains to makeand to use. the same` refer; ence being had to the accon'ipanyingdrawings, which illustrate the preferred form of the invention, thoughit' is to be understood that the invention is not limited to the exactdetails of construction shown and described, as it is obvious thatvarious modifications thereof within the scope of the claimsv will Ioccur to persons skilled in the 'a1-t.

'ln said drawings:

Fig. 1 is a central vertical section ol" a (ani: dome having a domeclosure constructed in accordance with this invention;

Fig. 2 a top'plan view o1 (horrid-nre shown in Fig. l: f

Fig. 3 is a horizontal section laken on lhe line 3-3 of llig. 1

Fig. 4 is a vertical section taken on the line 4-4 of Fig. 2, the coverbeing shown held in engagement with the dome ring by the retainingbolts;

liig. 5 is a section talienon the line. 5-5 or Fig. 4;

Fig. 6 is a. section taken on the line (3 6 ot Fig. 2, and

is a section taken on the line 4 4 of Fig. 2, the retaining bolts beingrshown partly reieased-and the cover raised lo en- ,gage the interlockingretaininglogs. l

vThis invention relates todoine closures for car tanks and has for anobject the pro-` vision ot an improved means Vl'or preventing the domecover being blown from the tank shonld the cover securing meztns hereleased when there. is pressure in the`-\tank.y the means permittingthe-cover to be raised suiticiently to vent the pressure from the tenir..lt is also an object of this invention to provide means which isapplicable to a cover which rotated slightly to release the pressure inthe tank and prevent rotation and removal of the cover while permittingof the cover being raised far enough to vent the pressure from the tank.

In the drawings the invention lis shown.

applied to a car tank 1 having the usual tanlcdome 2 provided with adome head 3 having the usual manhole opening 4Q The manhole opening issurrounded by a dome ring 5 secured to the dome head 3 by rivets (lengaging the `flange 7 yof the dome ring and the dome head 3. The domering 5 provides a seat for a dome cover 8 havmg an inwardly projectingannular flange il() braced by the reinforcing ribs 12. At diametricallyopposite points the flange l() has portions 14: which are of less radiusthan the remainder of the iiange 10 and are connected to the remainderof the Harige 10 by flange 'portions 13 and .17 'forming stops. rl'hoportions 14 oi" the iange 10 are provided at their outer edges withoutwardly projecting lugs 1G which extend from the stops 13 lo-thecenters of the flange portions 14 and are provided at theilxouter endswith lugs 18 forming stops which extend only part way from the lugs 16to the projecting top I5 oli the cover 8. The cover 8 .and the flange.portions 14 form pockets or recesses 20 which are closed at the ends bythcstops 13 and 1T and partly closed at the bottom by the lugs 1G andstops 18. openings being left between the stops 1T and 18 and betweenthe stop 1S and the top 15 of the cover 8 to receive inwardly projectinglugs 22 formed on the dome ring 5.

The cover 8 is also provided with radially extendin; r projections 24which are inclined upward slightly forming an angle with the top 150iEIthe cover and havetslots Q5 to receive bolts QG pivotally mo'unlted onpins .28 secured in ears formed integral with the dome ring 5.lleinforciug ribs-32 servo to brace the projections 24 and the top 15adjacent thereto.

t 1n the operation of this device the nuts :soA

A34 on the bolts 26 will engage with the projections 24 of the cover 8and secure the cover to its seat upon the dome ring 5. Upon releasingthe nuts 34, when there is pressure in the tank 1, the pressure willraise the cover 8 as the nuts 34 are released, the pressure in the tankholding the cover 8 against the nuts 34 so that the cover may not berotated to disengage the cover 8 from the bolts 26 until the nuts 34 areunscreived sufficiently to permit the lugs 16 on the flan e portions 14to engage with the lugs 22 on t e ring 5. The engagement o the lugs 22with the lugs 16 will prevent the cover 8 raising any further due to thepressure in the tank even though the nuts 34 are coml`ietely removedfrom the bolts 26 and the stops 13 and 18 on opposite sides of the lugs22 will prevent rotation of the cover. It will be noted that when thecover is raised by pressure in the tank and the lugs 16 are inengagement with the lugs 22, that the openings 20 between the stops 17and 18 provide a means for venting the pressure romthe tank.

If thenuts 34 are released when there is no pressure in the tank thecover 8 will remain seated upon the dome ring 5 but can not be rotatedso as to bring the openings 20 between the' sto'ps 17 and 18 oppositethe lugs 22 until after disengaging the bolts 26 from the slots 25 inthe projections 24.

When this is done the cover can be rotated to bring slots 20 intocoincidence with lugs 22 and the cover may then be Vraised from the ring5.

To secure the cover 8 to the dome ring it will be placed on the ringwith the openings between the stops 17 and 18 in line with the lugs 22and the bolts can then be brought up into line with the slots 25 in theprojections 24 only after the cover is given a partial rotation to bringthe bolts 26 into alinement with said slots .after 'which the bolts areinserted in the slots 25. At this time the lugs 16 are beneath the lugs22. liglitening the nuts 34 will then secure the cover 8 tol the ring 5.

What is claimed 1s: l 1. A tank dome closure comprising a dome ri. i'carried by the tank, a ldome cover to seat on said ring, means to securesaid cover to said ring and cooperating means on said ring and coverinterlockingr to pre vent removal oi' said cover when said cover israised by the pressure in the tank upon release ot said securing means.

2. A tank dome closure comprising a. dome ring carried by the tank, adome cover to seat on said ring, means to secure said cover to saidring, lugs projecting from said ring andl means on said cover tointerlock with said lugs and prevent removal of said cover when saidcover is raised by the presdome ring carried by the tank, a dome cover`to seat on said ring, pivoted securing bolts for said cover' carried bysaidring and engaged with said cover by rotation of said cover upon saidring, inwardly pro'ecting lugs carried by said ring, said covei` avingrecesses to receive said lugs, and lugs mounted in said recesses in saidcover to interlock with said lugs on said ring to prevent rotation andremoval ol" said cover when said cover is raised by pressure in the tankupon release or' said securing bolts.

Atank dome -closure comprising a dome ring carried by the tank andsurrounding the manhole opening, a dome cover to sent on said ring,means to secure said cover to 'said ring engaged with said cover by rotation oi said cover on said ring, lugs on said ring projecting into themanhole opening, said cover having recesses to receive said lugs, andlugs mounted in said recesses in said cover to interlock with said lugson said ring and prevent rotation and removal, of said cover when saidcover is raised by pressure in said tank upon release of Said securingnieans.

6. A tank dome closure comprising a dome ring carried by the tank andsurrounding the manhole opening, a. dome cover to seat on said ring,securing means i'or said cover carried by said rii'ig, lugs on said ringprojeciing into the manhole opening and lugs on said cover engaging saidings on 'said ring io prevent removal ot said cover when said coverraised by pressure in the tank upon releasing said securing means.

7. fr tank dome closure comprising dome ring carried bythe tank andsurroundin;r the manhole opening, a dome cover to seat on 'said ring,means carried by said ring to secure 'said-cover to said ring, lugs onsaid ring projecting in'io the manhole opening and lugs on 'said coverinterlocking with said lugs on said ring to prevent removal of saidcover when said cover is raised by pressure in the tank upon release ofsaid securing means.

S. A tank dome closure comprising a dome ring carried by the tank andsurrounding the manhole opening, a dome cover to sealJ on said ring,securing' bolts for said cover litt"l pivotaiiy mounted on said ring':mii engsiged cesses to receive said ings, andiugs mounted in saidrecesses in said cover to interlock with sind lugs on sind ruig toprevent rotatlon of said cover 'when said cover is raised by preesure inthe tank'u ing bolts.

pon release of said secur- In Witness whereof I have hereunto set myhand.

VICTOR WILLOUGHBY.

